header{
    display: flex;
    flex-direction: column;
    padding: 10px;
    background-color: #e1eff3;
    border-bottom: 1px solid #2aabd2;
}
header>div>a{
    border: 1px solid #999;
    background: linear-gradient(#EEE, #DDD, #EEE);
    padding: 5px 15px;
    border-radius: 5px;
    color: #555;
    text-decoration: none;
    margin-right: 10px;
}
a{
    text-decoration: none;
}

.content{
    padding: 10px 20px;
}
.content-head *{
    margin-bottom: 10px;
}
#content{
    padding: 10px 20px;
}